Sliding window



E. MUNKERT Aug. 15, 1933.

SLIDING WINDOW Filed Feb. 24, 1932 2 Sheets-Sheet 1 Ira/e Wrap:- EMZZMuW/ferf SLIDING WINDOW I Filed Feb. 24, 1932 2 Sheets-Sheet 2 PatentedAug. 15, 1933 PATE FFI f SLIDING WINDOW Emil Munkert,Esslingen-on-the-Neekar, Wurtemberg, Germany, assignor to FritzHopmeier,Stuttgart, Wurtemberg, Germany Application February 24, 1932, Serial No.594,914,

and in Germany February' 14, 1931 6 Claims.

I have filed applications in Germany Feb. 14, 1931, and Switzerland Feb.17, 1931..

This invention refers to improvements in or relating to windows. f

According to the invention there is provided a window wherein the weightof a pair of sashes is counterbalanced, and the object is that thecounterbalancing means shall act upon the upper sash by being suspendedfrom I pivoted lever means associated with the" said sash, in such amanner that upon movement of the upper sash, the effective point ofconnection between the counterbalancing means and the upper sash is alsomoved.

Other features of the invention are hereinafter particularly describedand set forth in the claims.

In order that the said invention may be clearly understood and readilycarried into eiiect, the same will now be described more fully, by wayof example, with reference tov the accompanying drawings, in which:--

Figure 1 is a longitudinal sectional view through the entire windowconstruction,

Figure 2 is an end view of the window frame showing the various partscorresponding to Figure 1,

Figure 3 is a longitudinal section of the window construction showingthe window'casements and in different positions than those shown inFiguse 1,

Figure 4 is an end view of the window frame showing the various movingparts in the positions corresponding to Figure 3, and

Figures 5 and 6, are end views of the window frame showing the variousmoving parts in certain positions on an enlarged scale.

Referring to the drawings, the levers and the counterweights are placedwithin the boxes on both sides of the window frame a; The belt formoving the easements is placedwithin the righthand box. The casement bis pivoted at each side on a lever c, which leveris supported by aturnbolt. Another operating lever 6 (Figures 5 and 6) inside the box,corresponds with the lever c, and is provided with a segment 1 of acog-wheel which engages a cog-wheel segment g of the lever h. The leverh is pivoted at one end by means of a bolt 1 and at its free endsupports a pulley k for carrying a wire or the like.

The upper casement is also pivoted on a lever Z turning in a bearingdisposed on the frame of the window. The lower casement m is guided asusual by a bolt or the like projecting into a vertical groove of thewindow frame. The weight of the lower casement m is compensated at bothsides of the pane by a wire nand by the counterweight 0 being within thebox. The wire n is fixed on the lower rail of the lower casement m, runsupwardly along this'casement within the window frame and is guided by apulley p, the wire n then runs around a guiding pulley q placed at thetop of the counterweight o and around a pulley 1c and finally it is ledto the free end of the lever 6, having started from this lever e andhaving passed the guiding'pulleys s along the outside of the window-boxand along the back of the said box.

As elearly indicated on the drawing, the wire n is fastened to the levere and it passes around pulleys s as indicated by r. The member 1" couldbe a wire, but since a wire is not very easily grasped by'the hand inorder to operate the window, it is advisable to provide the rope orstrap section 1" as indicated, one end of which is secured to the levereand' the other end is secured as indicated in back of the weight 0.This makes it very easy to grip the member 1' in order to operate thewindow, and as clearly indicated the section 1 and the wire n aresecured to the lever e.

The above described arrangement operates as follows:

The two easements b and m of the window being closed the two levers eand h form nearly a straight line, see Figure 5, and the lever c isparallel to the window frame. When the belt 1' is pulled, the ends ofthe levers e and it come together and the lever c forces the top of thewindowoutside the lower edge of this easement serving as an axis orpivot point, see Figure 1.1.

In this position of the easement, the air will enter the room and leaveit, but no rain, etc., can enter. In this position, the weight of theupper casement b is compensated for by the counterweight 0 which hasmoved downwardly for a short distance during this action.

By pulling the belt 1' further, the two levers e and it will becomenearly parallel and the upper casement will be pushed out of the grooveand to a'position outside the window frame by the lever Z. In thisposition the easement b is nearly parallel at a certain distance fromthe frame by turnbolts and the lower casement being slidably supportedin the frame; and a counterweight in the frame for both windoweasements, the point of influence of the counterweight being movablewith the movement of the upper window.

2. A window construction, comprising a window frame; a pivoted windowcasement pivotally mounted in the frame; a sliding window frame slidablymounted in the frame; a counterweight in the frame for both easements;and'means for connecting the easements with the counterweight so thateach will be counterbalanced thereby. V

3..A window construction, comprising a window frame; 'a window casementmounted in the frame; a plurality of levers for pivotally mounting saidwindow casement in the frame; a second window slidably mounted in theframe; a counterweight in'the frame for both easements; and means forconnecting the easements with the counterweight so that each will becounterbalanced thereby.

4. A window construction according to claim 3, in which the means forconnecting the casements with the counterweight includes an operatinglever in the frame connected to and operating with one of the pivotlevers of the first mentioned casement and a wire having one end securedto the operating lever and the other end to the second-mentioned windowcasement and intermediately to the counterweight.

- '5. A Window construction, comprising a window frame; a windowcasement mounted in the frame; a plurality of levers for pivotallymounting said window casement in the frame; a second window slidablymounted in the frame; a counterweight in the frame for both easements;an operating lever in the frame secured to and movable with one of thelevers of the first-mentioned window casement; a second lever in theframe operatively connected to the operating lever; and a wire havingone end secured to the operating lever and the other end to thesecond-mentioned window casement, and intermediately t0 thecounterweight, the second lever cooperating with the wire and comprisingthe point of influence of the counterweight.

6. A window construction according to claim 5, in which a belt isprovided cooperating with the operating lever to open or close thefirst-mentioned' window casement;

EMIL MUNKERT

